Window mounted air conditioning unit



14, 1956 H. A. WHEELER 2,758,456

WINDOW MOUNTED AIR CONDITIONING UNIT Filed Feb. 18, 1954 Fig. 3. W

INVENTOR. jam/d ,4. Wheeler WORM His Affamey WINDOW MOUNTED AIR CONDITIONING UNIT Harold A. Wheeler, Dayton, Ohio, assignor to General Motors Corporation, Detroit, Mich., a corporation of Delaware Application February 18, 1954, Serial No.-411,157

7 Claims. (Cl. 62-129) mounting bracket for the unit which makes it possible to mount standard units with the major portion outside the room so as to conserve on room space and so as to make it possible to pull window drapes in front of the unit when not in use.

Another object of this invention is to provide an improved shroud and mounting arrangement which is inexpensive and easy to install and which does not interfere with the air flow orrender the controls for the air conditioning equipment inaccessible from the inside of the room. Y

A further object of thisinvention is to provide a low cost mounting arrangement capable of supporting the full weight of the unit and capable of being adjusted so as to compensate for ditferences in wall thicknesses and window sill constructions. I

Further objects and advantages of the present invention will be apparent from the following description, reference being had to the accompanying drawings, wherein a preferred form of the presentinvention is clearly shown.

In the drawings:

Figure 1 is a perspective view with parts broken away showing a preferred embodiment of the device;

Figure 2 is an elevational viewwith parts broken away showing an air conditioning unit mounted in the window opening; and,

Figure 3 is a fragmentary sectional view taken substantially on line 3-3 of Figure 2.

Referring now to the drawing wherein a preferred embodiment of the invention has been shown, reference numetal 10 generally designates a conventional window air conditioning unit of the type which is adapted to be mounted on the window sill of a private home, oflice, or the like. The air conditioning unit includes the usual refrigerating system including an evaporator 12, a motorcompressor unit 14, a condenser 16, an evaporator fan- 18, a condenser .fan 20, and a fan operating motor 22 for driving the fans 18 and '20; A partition 21 separates the interior of the mainhousing into an evaporator compartment and a condenser compartment .in accordance with usual practice. Condenser cooling air is adapted to be introduced into the condenser compartment through side louvers 30 and is discharged out through the condenser air outlet opening 32 provided in the'rear wall of the cabinet.

The air to be conditioned enters the cabinet through an air inlet opening 34 provided in .thelower front edge of the unit and is discharged through the usual air outlet grill 36 provided in the upper front edge of the cabinet. Inasmuch as there are times when it is desired to exhaust air from the room to the outside via'the condenser comnited States Patent partment of the air conditioning unit it is customary practice to provide a damper 40 in the top wall of the unit through which room air may enter the condenser compartment and be exhausted to the outside through the condenser compartment.

Units of this general type are normally intended to be installed with substantially equal portions of the unit projecting on opposite sides of the window sill. There are instances however wherein it is not practical, both from the standpoint of conservation of room space and also from the standpoint of appearance to allow the unit to project any appreciable distance into the room. Accordingly, I have devised a mounting arrangement which makes it possible to place the major portion of the unit outside the space to be conditioned.

As best shown in Figures 1 and 2 of the drawing the air conditioning unit 10 is supported on a mounting plate 50 which is adapted to rest directly on the window ledge or on a special supporting block 52 provided on the window ledge as shown in Figure 2. This mounting plate is. held in place by means of a first bracket element 54 which is attached to the Window sill by means of one or more screws 56. This bracket 54 primarily serves to prevent the supporting plate 50 and the unit it) from moving outwardly. The outerend of the mounting plate Stlis supported by means of a U-shapedstrut 58 which has its upper ends pivotally secured to U-shaped brackets 60' which are adjustably bolted to the mounting plate 50 by one or more bolts 62 as best shown drawing. 7 r V .The lower end of the U-shaped strut 58 is adapted to rest against the side wall of the building as best shown in Figure 2. Since wall thicknesses vary considerably from one buiding to another it is desirable to provide an adjustment which will compensate for differences in wall constructions. In the arrangement shown an adjustable turnbuckle assembly 64 is provided for each arm of the U-shaped strut 58. As best shown in Figure 3 of the drawing which shows one of these turnbuckle assemblies, the lower end thereof includes a U-shaped element 66 which straddles the one arm of the strut 58 and is pivotally secured thereto by means of a pivot pin 68. The upper end of the turnbuckle assembly is provided with a similar U-shaped mounting element 70 which is pivotally secured to downturned portions on the bracket 60 by means of a pin 72. By adjusting the turnbuckle it is possible to adjust the angle at which the strut 58 engages the outer surface of the wall 74.

As best shown in Figures 1 and 2 of the drawing, the exhaust air damper 4i) as well as the control buttons and 82 for the air conditioning unit are mounted on that portion of the window air conditioning unit which is now located beyond the window line with the result that they would be inaccessible if the slidable window element 82 were to be moved down into contact with the upper surface of the air conditioning unit in accordance with prior art practice. In order to render these controls and the dampened accessible'a shroud or tunnel element 86 has been provided as shown. The front edge of the tunnel is provided with an outwardly extending flange 88 substantially in alignment with the slidable portion of the window 82 as shown in Figure 2 of the drawing whereas the rear edge of the tunnel 36 is provided with an inturned flange 99 which contacts the window unit it) at the point outside the space to be conditioned. It will be noted that the tunnel clears the upper side of the window unit 10 by an appreciable amount so as to not materially interfere with the flow of room air out through the air exhaust damper 49; The clearance between the side walls of the shroud 86 and the 'side walls of the air conditioning unit 10 is sufl'icient to provide an insulating air space between the side walls of the evaporator compartment and the in Figure 2 of the outside air. The inner surface of the shroud is lined with a layer of insulating material 100 which reduces the heat leak into the room. This layer may be of sponge rubber like material or any other suitable insulating material.

While the form of embodiment of the invention as herein disclosed constitutes a preferred form, it is to be understood that other forms might be adopted, as may come within the scope of the claims which follow.

What is claimed is as follows:

l. An air conditioning unit for mounting on a sill of a window opening, said unit comprising a housing adapted to extend through the window opening, air conditioning apparatus within said housing, means for dividing said housing into an evaporator compartment and a condenser compartment, air inlet and outlet means in the walls of said housing communicating with said condenser compartment, air inlet and outlet means in the walls of said housing communicating with said evaporator compartment, bracket means for supporting said unit on said window sill, and means for closing the space between said housing and the edges of said window opening including a shroud surrounding a portion of said unit in spaced relationship to the outer walls of said housing, said shroud including an inturned flange for engaging said housing along a line spaced from the plane of said Window opening whereby an insulating air tunnel is formed between portions of said housing and shroud.

2. In an air conditioning unit for mounting in a window opening in one wall of an enclosure, a cabinet, air conditioning apparatus within said cabinet including an evaporator for cooling air for the enclosure and a condenser tor dissipating the heat removed from the conditioned air, means for supporting said cabinet with one portion exposed to the air in said enclosure and another portion projecting into the outside atmosphere, and a shroud surrounding a portion of said cabinet in spaced relationship thereto and extending from said window opening outwardly from said window opening and contacting the side walls of said cabinet at a point beyond said window opening whereby a tunnel is formed leading from said enclosure to a point outside said enclosure.

3. in combination with an air conditioning unit of the type having a cabinet adapted to be mounted on a window sill in one wall of an enclosure, a mounting device for said cabinet comprising a plate adapted to be supported on said window sill with an end portion thereof projecting to the outside of said enclosure, bracket means for supporting said plate on said window sill, said bracket means comprising a substantially U-shaped strut having the upper ends thereof pivotally secured to said project ing end of said plate and having the lower portion thereof resting against said enclosure wall, and turnbuckle means having one end secured to a portion of said strut and having its other end secured to said mounting plate, and means for sealing the space between the edges of the window opening and said cabinet, said means including a shroud having its one end arranged substantially in alignment with said window opening and having its outer end arranged to engage said unit'at a point spaced from the plane of said window opening whereby a tunnel is formed extending from said room to a point outside said room, said air conditioning unit including a control element located in said tunnel.

4. An air conditioning unit a window opening, said unit comprising a housing adapted to extend through the window opening, air conditioning apparatus within said housing, means for dividing said housing into an evaporator compartment and a condenser compartment, air inlet and outlet means in the walls of said housing communicating with said condenser compartment, air inlet and outlet means in the walls of said housing communicating with said evaporator compartment, bracket means for supporting said unit on said Window sill, means for closing the space between said housing and the edges of said window opening including a shroud surrounding a portion of said unit in spaced for mounting on a sill of relationship to the outer walls of said housing, said shroud including an inturned flange for engaging said housing along a line spaced from the plane of said Window opening whereby an insulating air tunnel is formed between portions of said housing and shroud, and control means for said air conditioning unit disposed within said tunnel.

5. An air conditioning unit for mounting on a sill of a window opening, said unit comprising a housing adapted to extend through the window opening, air conditioning apparatus within said housing, means for dividing said housing into an evaporator compartment and a condenser compartment, air inlet and outlet means in the walls of said housing communicating with said condenser compartment, air inlet and outlet means in the walls of said housing communicating with said evaporator compartment, bracket means for supporting said unit on said window sill, means for closing the space between said housing and the edges of said window opening including a shroud surrounding a portion of said unit in spaced relationship to the outer walls of said housing, said shroud including an inturned flange for engaging said housing along a line spaced from the plane of said window opening whereby an insulating air tunnel is formed between portions of said housing and shroud, and control means for said air conditioning unit disposed within said tunnel, said last named means including a damper for controlling the flow of air from within said tunnel through one of said air inlet means.

6. An air conditioning unit for mounting on a sill of a window opening, said unit comprising a housing adapted to extend through the window opening, air conditioning apparatus within said housing, means for dividing said housing into an evaporator compartment and a condenser compartment, air inlet and outlet means in the walls of said housing communicating with said condenser compartment, air inlet and outlet means in the walls of said housing communicating with said evaporator compartment, bracket means for supporting said unit on said window sill, and means for closing the space between said housing and the edges of said window opening including a shroud surrounding a portion of said unit in spaced relationship to the outer walls of said housing, said shroud including an inturned flange for engaging said housing along a line spaced from the plane of said window opening whereby an insulating air tunnel is formed between portions of said housing and shroud, said means for dividing said housing into compartments being substantially in alignment with said inturned flange on said shroud whereby the external walls of said evaporator compartment are exposed to the room air and the external walls of said condenser compartment are exposed to the outside air.

7. An air conditioning unit for mounting on a wall opening, said unit comprising a housing adapted to extend through the opening, air conditioning apparatus within said housing, means for dividing said housing into an evaporator compartment and a condenser compartment, air inlet and outlet means in the walls of said housing communicating with said condenser compartment, air inlet and outlet means in the walls of said housing communicating with said evaporator compartment, bracket means for supporting said unit in said opening, and n shroud surrounding a portion of said unit in spaced relationship to the outer walls of said housing, said shroud including an inturned flange for engaging said housing along a line spaced from the plane of said wall opening whereby an insulating air tunnel is formed between portions of said housing and shroud.

References Cited in the file of this patent UNITED STATES PATENTS 

